Hi, all!
I am doing porting jobs on GX2([EMAIL PROTECTED]) + cs5535. I am using
OLPC/rev_a directory as my starting point.
I know that OLPC use GX2([EMAIL PROTECTED], right??) + cs5536. From POST card i
see the code runs far behind the code
of auto.c(src/mainboard/olpc/rev_a/auto.c), and there should be some
information printed from uart1, actually there is
none.
As for cs5536, i see cs5536_setup_onchipuart() called before uart_init(),
and i find the MSRs handled in
cs5536_setup_onchipuart do exist in cs5535. So i added a function named
cs5535_setup_onchipuart in
cs5535_early_setup.c, and call that functions in auto.c. The same result,
nothing printed from uart1.
I googled related information, i found someone said we must first loaded
VSA before we can use internal uart of
cs5535. I have a little bit understanding on VSA. From my point of view, i see
VSA is an auto tools for OS to access
standard x86 compatible registers and ios from not fully x86 compatible system
like cs5535. And i think
cs5535_setup_onchipuart handles accessing msr in cs5535 manually as what VSA
should do and we do not need to
firstly load VSA at auto.c. If I were right, why nothing appears from uart??
Any advice would be well appreciated.
Regards
lihao
2007-02-04
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